One vertex per element, one color per generator, with an edge from x to x·s.
(5,6)(7,10)(8,9)(11,12)(13,14,17,19)(15,18,16,20)(21,22,24,26)(23,29,30,36)(25,33,32,28)(27,34,35,31)(1,2)(3,4)(6,9)(10,12)(13,15,17,16)(14,18,19,20)(22,26)(27,35)(28,33)(29,36)(2,4)(5,7,8,11)(6,10,9,12)(13,16,17,15)(14,18,19,20)(22,26)(23,30)(28,33)(31,34)(7,11)(10,12)(21,23,24,30)(22,27,26,35)(25,34,32,31)(28,36,33,29)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.